Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

Record Details:

Title:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Date:
1914
Author:
Gage, Simon Henry, 1851-1944
Publisher:
Ithaca, N.Y. : Comstock Publishing Company
Volume:
Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine
Leaf #:
00057
Language:
English
Subjects:
Lantern projection, Motion picture projection
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Bibliography: p. 693-703
Date Added:
July 19, 2022
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

CENTERING THE MAGIC LANTERN [CH. I FIG. 19. CONCENTRIC CIRCLES ON THE FACE OF THE CONDENSER, SHOWING THE SIZE OF THE CIRCLE OF LlGHT WITH VARIOUS POSITIONS OF THE RADIANT. When the radiant is at the proper distance, the entire face of the condenser is illuminated (l). As the radiant and condenser are separated the part illuminated becomes smaller and smaller (2-4). (See also fig. 20). cylinder of approximately parallel rays between the two elements of the condenser, and will fully light the face of the second element. One can determine this easily by putting a sheet of white paper over the face of the condenser which is toward the objective. If the radiant is in the right place the entire face will be light. If the radiant is too far off, only a part of the face will be illuminated (fig. 19). If the radiant is too close the face will be lighted, but the light will be diverging between the condenser lenses. In this case a part of the light falls outside the second element and is lost. There is liable also to be a defective screen image (fig. 28) . One can get the condenser at the right distance from the lamp by first separating the lamp and condenser a considerable distance and then gradually bringing them closer and closer together until the condenser face is just filled with light. Sometimes the radiant is put nearer than the principal focal distance on purpose, so as to correct in part for the lack of proper proportion between the condenser and the objective (ยง 56).